Pixhawk solid white light

my pixhawk glows a solid white light. What could be the reason? didn’t find the answer anywhere

With all this detailed background information i believe that it is hard to find the reason.

and there is no other information)
I tried it on different computers, connected via USB, via an external power supply
There is power to the modules (gps, telemetry), but the pixhawk itself is inanimate, does not connect to the computer, and is not visible in the device manager